Earlier this morning, mobile phone carrier Sprint released its 10-K filing with the SEC for the fiscal year ending in December. In the filing, it revealed that it had made a commitment with Apple to purchase a minimum number of iPhones from Apple amounting to $15.5B in outlay.

Horace Dediu of Asymco makes a good case that Sprint’s commitment is somewhere around 23.8 million iPhones.

Sprint previously said that it needed to buy some 30.5 million iPhones over the next few years in order to stay competitive with rival carriers.

T-Mobile even attributed its recent financial troubles directly to it not carrying the device.